Supports USB-A/Type-C/Micro-USB and other multi-port conversion applications - 1.44-inch high-definition color Chinese interface high-definition display screen, 8A high current. 4 function buttons, 5 universal interfaces, 7 display interfaces, etc. Line resistance measurement, all kinds of USB chargers, power , data cables, etc.; high-precision measurement of devices. Supports 360-degree screen rotation, meeting readings at any angle - Long press the button corresponding to the horizontal menu bar to rotate the screen, so that digital devices can be inserted at any angle and can read forward, making measurement more convenient. Real-time current and voltage curve display, two modes and two curve detection - voltage and current curve detection; D+D- curve detection, real-time viewing of current and voltage fluctuations, such as abnormal charging, can be immediately discovered, it is an ideal choice for charging monitoring. Line resistance measurement - After inserting the data cable, the tester screen turns black, indicating that the voltage difference is too large, the tester enters the 4.5V power-off state, and the load current needs to be reduced and the measurement starts from the first step again. After resistance measurement is completed, restart the measurement after the tester is powered on next time. Test USB chargers and monitor the performance stability of the charger - Play and test USB chargers, and you can easily test them with a constant current load. You only need to adjust the load knob to test the charging current and voltage values, let the charger be used for a long time with load, and detect the performance stability of the charger. Supports full data transmission of Type-C interface and compatible with fast charging protocol, PD protocol and Qualcomm QC3.0/4.0 protocol -One meter is compatible with multiple protocols for fast charging, supports PD/QC2.0/3.0/4.0, MTK and other protocols. Use a Type-C data cable to insert the Type-C input port of the A3 color screen meter and then use a dual male Type-C cable to insert the Type-C output port of the A3 color screen meter, and the other end is connected to the mobile phone charging port, then the PD protocol and Qualcomm protocol direct charging measurement can be completed. Power-off memory storage data function, test the capacity of power - With power-off storage function, the power bank capacity data can be stored when the mobile power bank is powered off, which is convenient for subsequent viewing and capacity testing of the mobile power bank. The current capacity is temporarily stored when the power is off, and the current capacity be accumulated when the machine is restarted. If it is not needed, it can be manually cleared. Colour:Black Material:ABS Package Contents: 1 * A3 USB tester 1 * PD data cable (240W) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.